SNAP Analog Input Modules
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
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SNAP Analog Input Modules
PAGE
6
DATA SHEET
Form 1065-140815
Current Input Module, -20 mA to +20 mA, Two or Four Channels
Specifications
Description
The SNAP-AIMA and SNAP-AIMA-4 modules provide an input
range of -20mA to +20mA. The SNAP-AIMA has two channels,
and the SNAP-AIMA-4 has four. If you need a similar module
with more channels, see page 9. Check the table on page 3 for
I/O processor compatibility. These modules DO NOT supply
loop excitation current.
Since all inputs share a common
reference, the module must be
installed at the beginning or end
of a typical 4–20mA loop. If you
are using both standard and self-
sourcing transmitters, either put
the transmitters on different
modules or use different power
supplies. If you need channels
that are isolated from each other
on the same module, see
Opto 22 form #1182.
Input Range -20 mA to +20 mA
Resolution 0.8 microamps
Over-Range Limits
From -22 to +22 mA
(+/-20 mA range)
Input Response Time
(% of span/ delta I/delta tme)
99.9% / 19.9 mA / 10 ms
Data Freshness (Max)
SNAP-AIMA: 11.5 ms
SNAP-AIMA-4: 23 ms
DC Common Mode Rejection >-120 dB
AC Common Mode Rejection >-120 dB @ 60 Hz
Maximum Survivable Input 36 mA or 9 VDC
Maximum Operating Common
Mode Voltage
250 V
Accuracy 0.05% (10 microamps)
DRIFT: Gain Temperature
Coefficient
30 PPM/ °C
DRIFT: Offset Temperature
Coefficient
15 PPM/ °C
Power Requirements 5 VDC (±0.15 ) @ 170 mA
Input Resistance - Single
Ended
200 ohms (each channel)
Operating Temperature -20 °C to 70 °C
Storage Temperature -40 °C to 85 °C
Torque, hold-down screws 4 in-lb (0.45 N-m)
Torque, connector screws 5.26 in-lb (0.6 N-m)
Wire size 22 to 14 AWG
Agency Approvals UL, FM, CE, RoHS, DFARS
Warranty Lifetime
Part Number Description
SNAP-AIMA
Two-channel analog current input,
-20 mA to +20 mA
SNAP-AIMA-4
Four-channel analog current input,
-20 mA to +20 mA
SNAP-AIMA Wiring
(Two channels)
Wiring diagrams continue
on the following page.
